NOCO HM408 4D Commercial Battery Box – Rugged Storage for Marine & RV

Meet the NOCO HM408 4D Commercial Battery Box, a robust storage solution designed to house a single group 4D battery for marine, RV, boat, trailer, and commercial equipment applications. Its purpose-built footprint helps keep wiring organized and protected in tight spaces.

Installation is straightforward thanks to a four corner fastening system and a captive lid that stays out of the way during mounting. Large cable entry holes accommodate heavy gauge wires, while full flow ventilation helps release battery gases in confined areas. A large battery acid reservoir adds containment and makes cleanup easier if needed.

Built to endure challenging environments

The rugged, rotational-molded enclosure is engineered to resist impact and harsh conditions, including exposure to UV, oil, gas, and other contaminants. It remains functional in cold environments down to minus 40 degrees Fahrenheit, making it suitable for coastal marinas or remote campsites.

In addition to weather resistance, the HM408 helps reduce water entry, contains potential leaks, and protects terminal areas, supporting safer, tidier battery setups on watercraft or road-ready installations.

Certifications and reliability

The HM408 meets US Coast Guard regulations CFR 183.420 and ABYC E-10.7 specifications, indicating alignment with recognized safety and electrical standards for marine and RV gear.

Usage ideas you can consider

• Boat installations with group 4D batteries to keep power systems organized.
• RV or motorhome battery hubs that stay accessible yet protected from the elements.
• Trailer or caravan setups where a dedicated box minimizes clutter.
• Commercial equipment or generator energy storage where rugged durability matters.

Key benefits at a glance

• Commercial-grade capacity for a single 4D battery.
• Four-corner mounting and captive lid for quick, tidy installations.
• Large entry holes designed for heavy-gauge wires.
• Full-flow ventilation to release gases safely.
• Battery acid reservoir for containment and cleanup readiness.
• Rugged rotational-molded construction that endures cold, UV, oil, and contaminants.
• USCG CFR 183.420 and ABYC E-10.7 compliant for added assurance.